91166464785 has 16 divisors (see below), whose sum is σ = 159126920640. Its totient is φ = 44201922240.

The previous prime is 91166464747. The next prime is 91166464787. The reversal of 91166464785 is 58746466119.

It is not a de Polignac number, because 91166464785 - 2⁹ = 91166464273 is a prime.

It is a super-2 number, since 2×91166464785² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91166464787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276261850 + ... + 276262179.

It is an arithmetic number, because the mean of its divisors is an integer number (9945432540).

Almost surely, 2^91166464785 is an apocalyptic number.

It is an amenable number.

91166464785 is a deficient number, since it is larger than the sum of its proper divisors (67960455855).

91166464785 is a wasteful number, since it uses less digits than its factorization.

91166464785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552524048.

The product of its digits is 8709120, while the sum is 57.

The spelling of 91166464785 in words is "ninety-one billion, one hundred sixty-six million, four hundred sixty-four thousand, seven hundred eighty-five".